Module: Local Morphometry
(c) 2001 by O.Conrad
Menu: Terrain Analysis > Morphometry
Description
Calculates local morphometric terrain attributes (i.e. slope, aspect and curvatures).

References:

Maximum Slope
- Travis, M.R. / Elsner, G.H. / Iverson, W.D. / Johnson, C.G. (1975):
'VIEWIT: computation of seen areas, slope, and aspect for land-use planning',
USDA F.S. Gen. Tech. Rep. PSW-11/1975, 70p. Berkeley, California, U.S.A.

Maximum Triangle Slope
- Tarboton, D.G. (1997):
'A new method for the determination of flow directions and upslope areas in grid digital elevation models',
Water Ressources Research, Vol.33, No.2, p.309-319

Least Squares or Best Fitted Plane
- Horn, B. K. (1981):
'Hill shading and the relectance map',
Proceedings of the IEEE, v. 69, no. 1, p. 14-47.

- Beasley, D.B. / Huggins, L.F. (1982):
'ANSWERS: User’s manual',
U.S. EPA-905/9-82-001, Chicago, IL. 54pp.

- Costa-Cabral, M., and Burges, S.J., (1994):
'Digital Elevation Model Networks (DEMON): a model of flow over hillslopes for computation of contributing and dispersal areas',
Water Resources Research, v. 30, no. 6, p. 1681-1692.

Fit 2.Degree Polynom
- Bauer, J. / Rohdenburg, H. / Bork, H.-R. (1985):
'Ein Digitales Reliefmodell als Vorraussetzung fuer ein deterministisches Modell der Wasser- und Stoff-Fluesse',
Landschaftsgenese und Landschaftsoekologie, H.10, Parameteraufbereitung fuer deterministische Gebiets-Wassermodelle,
Grundlagenarbeiten zu Analyse von Agrar-Oekosystemen, (Eds.: Bork, H.-R. / Rohdenburg, H.), p.1-15

- Heerdegen, R.G. / Beran, M.A. (1982):
'Quantifying source areas through land surface curvature',
Journal of Hydrology, Vol.57

- Zevenbergen, L.W. / Thorne, C.R. (1987):
'Quantitative analysis of land surface topography',
Earth Surface Processes and Landforms, 12: 47-56.

Fit 3.Degree Polynom
- R.M. Haralick (1983):
'Ridge and valley detection on digital images',
Computer Vision, Graphics and Image Processing, Vol.22, No.1, p.28-38


Parameters
NameTypeIdentifierDescriptionConstraints
Input
Elevation Grid (input)ELEVATION
Output
SlopeGrid (output)SLOPE
AspectGrid (output)ASPECT
Curvature (*)Grid (optional output)CURV
Plan Curvature (*)Grid (optional output)HCURV
Profile Curvature (*)Grid (optional output)VCURV
Options
MethodChoiceMETHODAvailable Choices:
[0] Maximum Slope (Travis et al. 1975)
[1] Maximum Triangle Slope (Tarboton 1997)
[2] Least Squares Fitted Plane (Horn 1981, Costa-Cabral & Burgess 1996)
[3] Fit 2.Degree Polynom (Bauer, Rohdenburg, Bork 1985)
[4] Fit 2.Degree Polynom (Heerdegen & Beran 1982)
[5] Fit 2.Degree Polynom (Zevenbergen & Thorne 1987)
[6] Fit 3.Degree Polynom (Haralick 1983)
(*) optional